11941681 has 4 divisors (see below), whose sum is σ = 11956032. Its totient is φ = 11927332.

The previous prime is 11941613. The next prime is 11941691. The reversal of 11941681 is 18614911.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 11941681 - 2¹⁵ = 11908913 is a prime.

It is a super-2 number, since 2×11941681² = 285207490211522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11941691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5845 + ... + 7618.

It is an arithmetic number, because the mean of its divisors is an integer number (2989008).

Almost surely, 2^11941681 is an apocalyptic number.

It is an amenable number.

11941681 is a deficient number, since it is larger than the sum of its proper divisors (14351).

11941681 is an equidigital number, since it uses as much as digits as its factorization.

11941681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14350.

The product of its digits is 1728, while the sum is 31.

The square root of 11941681 is about 3455.6737403870. The cubic root of 11941681 is about 228.5713650111.

The spelling of 11941681 in words is "eleven million, nine hundred forty-one thousand, six hundred eighty-one".